File Server

File Server is an app that turns your Android device into a local area network (Wi-Fi) dedicated file server. You can view and transfer folders on your phone directly from a PC or other devices without cable connections or cloud uploads.

How it works — When a user selects a folder to share and presses "Start Server," only that folder is exposed to the network. Devices on the same Wi-Fi network connect via the address (or QR code) displayed on the dashboard, and files outside the folder cannot be accessed via any protocol. The server runs as a foreground service, and notifications allow you to check the number of connections, copy the address, and stop immediately.

4 Connection Protocols (Select only one to use)

SFTP (Default :2222) — SSH-based, most secure. Recommended method.

FTPS ( :2120) — TLS-encrypted FTP. Compatible with Explorer and older clients.

FTP ( :2121) — Plain text. Activate after warning to use only when absolutely necessary

WebDAV (:8443 select HTTPS / HTTP) — Opens directly in a browser or file explorer, provides an HTML directory index

Ports can be changed in case of conflicts, and encryption status for each protocol is specified in the UI.

Accounts and Permissions — Access is restricted to accounts (name and password) created directly within the app. Read-only and read-write permissions can be assigned per account (read-only is enforced at the code level across all four protocols), and bandwidth limits can be set per account. Passwords are encrypted using the Android Keystore (AES-256-GCM) and stored only within the device.

Privacy — The structure does not include developer servers or databases. Accounts, settings, and files never leave the device, and the only information developers receive is diagnostic information (Sentry) in the event of an app error. Deleting the app removes all settings, and the app can be deleted at any time via "Reset App" in Settings. Other features — an in-app explorer to view shared folders (the same list seen by connected users), a real-time connection session and transfer speed panel, uptime display, Wi-Fi disconnection warning, Korean and English support, and light/dark themes with paper and ink textures.